739985 has 4 divisors (see below), whose sum is σ = 887988. Its totient is φ = 591984.

The previous prime is 739969. The next prime is 740011. The reversal of 739985 is 589937.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 589937 = 317 ⋅1861.

It can be written as a sum of positive squares in 2 ways, for example, as 478864 + 261121 = 692^2 + 511^2 .

It is a cyclic number.

It is not a de Polignac number, because 739985 - 2⁴ = 739969 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73994 + ... + 74003.

It is an arithmetic number, because the mean of its divisors is an integer number (221997).

2⁷³⁹⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

739985 is a deficient number, since it is larger than the sum of its proper divisors (148003).

739985 is a wasteful number, since it uses less digits than its factorization.

739985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148002.

The product of its digits is 68040, while the sum is 41.

The square root of 739985 is about 860.2238080872. The cubic root of 739985 is about 90.4498058095.

The spelling of 739985 in words is "seven hundred thirty-nine thousand, nine hundred eighty-five".